Mobile terminal, system and method for controlling access to an enhanced services system

Abstract

A mobile terminal having restricted access to an enhanced services system includes a transceiver which transmits and receives wireless signals, a memory which stores a first preferred roaming list (PRL) listing a basic communication system and an enhanced services system, and a second PRL listing the basic communication system but not the enhanced services system, and a controller which restricts access of the mobile terminal to the enhanced services system by deactivating the first PRL and activating the second PRL in response to receipt of an authentication failure report from the enhanced services system. A system for restricting access to an enhanced services system includes an enhanced services system which provides enhanced services to authorized users and prevents unauthorized users from communicating with the enhanced services system.

Description

[0001]This application claims the benefit of Korean Patent Application No. 10-2005-0088976, filed on Sep. 23, 2005, which is hereby incorporated by reference in its entirety.BACKGROUND OF THE INVENTION[0002]1. Field of the Invention[0003]The present invention relates to a mobile communication system, and more particularly, to a mobile terminal, system and method for restricting access to an enhanced services system.[0004]2. Description of the Related Art[0005]Evolution-Data Optimized (EVDO), also referred to as Evolution-Data Only, is a wireless radio broadband data standard for high data rate communication. As demand for high data rate services, such as Video On Demand (VOD) and Music On Demand (MOD), is increasing, EVDO systems are increasingly being deployed with pre-existing voice networks, such as 1× networks. Although 1× networks are capable of providing data communication, they are optimized for voice communication and cannot provide the high data rates which EVDO systems pro...

AI Technical Summary

Benefits of technology

[0018]The enhanced services system may determine whether a mobile terminal user is an authorized user of the enhanced services system based on a subscriber identifier of a mobile terminal of the user. The enhanced services system may prevent an unauthorized user from communicating with the enhanced services system by deleting a first PRL stored in a mobile terminal of the unauthorized user which lists a basic communication system and the enhanced services system, and downloading to the mobile terminal a second PRL which lists the basic communication system but not the enhanced services system. The enhanced services system may allow the unauthorized user to communicate with the enhanced services system when the unauthorized user becomes an authorized user by deleting the second PRL and downloading the first PRL to the mobile terminal. The basic communication system may be a 1× system, and the enhanced services system may be an EVDO system.

Problems solved by technology

The enhanced services system may send the authentication failure report to the mobile terminal if a user of the mobile terminal is not an authorized user of the enhanced services system.

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